I'm just building a site using WP after spending a few years with Joomla.
I downloaded the Grunge package with the WP installer included and everything has worked perfectly.
The problem I have is how I edit the top section with the image of the tree and the text next to it that starts with:
"Grunge Free/GPL Template Release"
The only place I can find this is in a file called sample_widgets.php. I'm quite happy to edit this file but it looks like it should be simpler than this. In Joomla it would just be a custom HTML module inserted into that position.